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Description
The Oppo A18 4G (Model CPH2591) replacement battery relies on Oppo's high-capacity lithium-polymer architecture to handle efficient power management safely. To maintain stable battery health tracking and optimal charging metrics, an exact specification match is required.
Technical Battery Specifications
When purchasing a replacement cell from a parts wholesaler, service-pack supplier, or online store, verify that the technical parameters printed on the casing match these exact factory specifications:
| Feature | Factory Hardware Specification |
| Compatible Model | Oppo A18 4G (Strictly Model CPH2591) |
| Battery Model Number | BLPA21 (Must match exactly) |
| Cell Core Composition | Lithium-ion Polymer (Li-Po) |
| Typical Capacity | 5000 mAh (19.55 Wh) |
| Rated Capacity | 4850 mAh (18.77 Wh) |
| Nominal Voltage | 3.87 V |
| Limited Charging Voltage | 4.45 V |
| Fast Charge Protocol | 10W standard intelligent charging support |
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